Semi-peak value

Noise is one method of waveform detection. Quasi-peak detection is a method that detects an intermediate value between peak detection, which detects the height of waveform peaks by setting the discharge time constant of the detector sufficiently larger than the charge time constant, and average detection, which detects the average value of the waveform. In quasi-peak detection, time constants are usually defined by CISPR16. Peak detection tends to produce higher measurement results when the noise duration is long and its frequency is high. Therefore, it is effective for capturing a sensory measure of noise. Quasi-peak detection is also effective as a method to reduce peak value errors caused by long response times when measuring impulsive noise with a meter-type measuring instrument.